最近遇到一個問題，窗體在Loaded同時Resize會出現黑屏或者直接崩潰， 調查發現是WPF后端的Render線程渲染UI到DirectX時崩潰。 硬件環境：WES7 + .Net4.0 [關于WPF有2個線程的解釋如下：](https://msdn.microsoft.com/zh-cn/library/ms741870(v=vs.90).aspx) *WPF 應用程序從兩個線程開始：一個用于處理呈現，一個用于管理 UI。呈現線程有效地隱藏在后臺運行，而 UI 線程則接收輸入、處理事件、繪制屏幕以及運行應用程序代碼。* 遇到的這個問題就是用于處理呈現的線程掛了，異常如下： Exception from HRESULT: 0x88980406 Stack Trace: 0000000021a4d8d8 000007fef7a66869 [HelperMethodFrame: 0000000021a4d8d8] 0000000021a4da20 000007fee485ae0f System.Windows.Media.Composition.DUCE+Channel.SyncFlush()***WARNING: Unable to verify checksum for PresentationCore.ni.dll 0000000021a4dae0 000007fee3e95615 System.Windows.Interop.HwndTarget.UpdateWindowSettings(Boolean, System.Nullable`1<ChannelSet>) 0000000021a4dd10 000007fee3eabfec System.Windows.Interop.HwndTarget.UpdateWindowSettings(Boolean) 0000000021a4dd80 000007fee3eabd0e System.Windows.Interop.HwndTarget.UpdateWindowPos(IntPtr) 0000000021a4dee0 000007fee3e95fd7 System.Windows.Interop.HwndTarget.HandleMessage(MS.Internal.Interop.WindowMessage, IntPtr, IntPtr) 0000000021a4e070 000007fee3e93d14 System.Windows.Interop.HwndSource.HwndTargetFilterMessage(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef) 0000000021a4e0c0 000007fee4b2b450 MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef) **[微軟分析的原因及建議方案](http://blogs.msdn.com/b/dsui_team/archive/2013/11/18/wpf-render-thread-failures.aspx)** 1. Update your video drivers, and/or try different video hardware in the problem machine(s). 【試過560、660、770、970顯卡都不會解決問題， 試過320.18, 320.49, 353.30等驅動也都不會解決問題】 2. Disable Hardware rendering. As a quick test, you can use the DisableHWAcceleration registry value discussed here. You would set the value to 1 in order to disable WPF's hardware rendering pipeline. Note that this affects all WPF applications running in that user's session, so be advised you might be impacting more than one application. There are other options for disabling hardware acceleration at a more granular level. Starting in .Net 3.5, you can disable it programmatically on a per-window basis by using the HwndTarget.RenderMode property. Starting in .Net 4.0, you can disable it programmatically on a per-process basis by using the RenderOptions.ProcessRenderMode property. 【更改注冊表不會解決問題】 3. Upgrade to the latest version and service pack level of the .Net Framework available for your target platform. 【升級到Net 4.5后，問題解決。降級到4.0后，又出現】 4. Disable the use of Windows.AllowsTransparency and Popup.AllowsTransparency in your application.【包裝的應用窗體的AllowsTransparency為False】 5. If you are on Windows XP or Windows 2003, test on a newer operating system, and upgrade if possible.【沒有測試，升級OS不太可能】 6. If System.OutOfMemoryExceptions are being reported, then monitor the process's memory usage in Performance Monitor; particularly the Process\Virtual Bytes, Process\Private Bytes, and .NET CLR Memory\# Bytes in All Heaps counters. Also monitor the User Objects and GDI Objects for the process in Windows Task Manager. If you can determine that a specific resource is being exhausted, then troubleshoot the application to fix whatever is causing that resource consumption. Ultimately that should resolve the System.OutOfMemoryException.【查看內存和句柄等，沒有內存泄露】 **[微軟說明](https://connect.microsoft.com/VisualStudio/feedback/details/674249/wpf-renderer-thread-exited-with-codes-0x88980406-0x88980403)**[](https://connect.microsoft.com/VisualStudio/feedback/details/674249/wpf-renderer-thread-exited-with-codes-0x88980406-0x88980403)**[Net 4.5](https://connect.microsoft.com/VisualStudio/feedback/details/674249/wpf-renderer-thread-exited-with-codes-0x88980406-0x88980403)[解決此問題：](https://connect.microsoft.com/VisualStudio/feedback/details/674249/wpf-renderer-thread-exited-with-codes-0x88980406-0x88980403)**